GT-8

The BOSS GT-8 is a powerful multi-effects processor which was preceded by the GT-6 and followed by the GT-10. Introduced on 20 Jan 2005 at Winter NAMM 2005, it was the first to feature two COSM engines allowing different effects and modulations to be run on two different modeled amplifiers simultaneously.
Appearance
The GT-8 is framed in a black and grey, sturdy metal box. It has 5 footswitches, expression pedal, 15 knobs, 32 buttons and one dial. It has green, backlit 2×16 character LCD for texts and two digit 7 segment LED display for bank number.
The construction is robust and solid. The device weights 4.8kg.
Features
Dual amplifiers
One of the most notable features in the device is the dual COSM amplifier emulation. Which allows the user to combine the sounds of two different guitar amplifiers in several different methods.
* Single - Only one amp is audible, but can be switched with a footswitch or by other method. Because there is two separate chips for processing, the switch is fast and doesn't have any audible glitch.
* Dual Mono - The signal from both amps is mixed and the mix level can be controlled for best blend.
* Dual Stereo - Each amp is sent to different stereo channel. Either channel can have time delay applied for deeper stereo effect.
* Picking Dynamics - The mix ratio is decided by how hard player picks guitar strings. When picking softly the amp A is used and when picking hard, the amp B is used.
Effects
The processor has 13 effect blocks which can be set in any order, using the "effect chain" feature. Each effect block can be disabled.<ref name="details"/>
The effect blocks are:
* Compressor
* Wah-Wah
* Overdrive/Distortion
* Preamp/Speaker
* Equalizer
* Noise suppressor
* Delay
* Chorus
* Reverb
* Effect 1
* Effect 2
* Foot volume
* External loop
The Effect 1 and 2 blocks have 16 shared effects which can be used in both blocks. and Effect 2 block has 11 additional effects which can be used only on the second block.
The external loop effect relays the signal out of the processor, so external effect pedals can be used. Because the effect blocks can be freely arranged some artists have found it a good idea to use external loop for real guitar amplifier head.

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